联合应用参麦和丹参注射液对急性心肌梗死缺血/再灌注心肌的保护作用

目的　探讨联合应用参麦和丹参注射液对急性心肌梗死 (AMI)早期缺血心肌和缺血 /再灌注心肌的保护作用。方法　采用化学分光比色法检测分析了 2 2例联合应用参麦、丹参注射液的AMI患者血清超氧化物歧化酶 (SOD)及丙二醛 (MDA)的动态变化 ,并与 18例常规治疗组及 2 0例健康对照组的检测结果进行了比较。结果　所有急性心肌梗死患者入院即刻检测血清中SOD水平均较健康对照组降低〔(81 6 2± 8 81)nU/mLvs (10 4 0 2± 10 84 )nU/mL ,P <0 0 1〕 ,而MDA水平升高〔(8 14± 2 76 )nmol/mLvs (4 0 6± 1 2 7)nmol/mL ,P <0 0 0 1〕 ;随治疗时间推移 ,加用参麦与丹参注射液组与常规治疗组比较SOD及MDA水平有明显差异 (P <0 0 1) ,SOD于治疗后第 1天降至最低水平〔(73 11± 7 0 2 )nU/mLvs (6 4 32± 4 99)nU/mL〕 ,随后逐渐升高 ;MDA于治疗后第 1天升至最高水平〔(9 94± 2 2 )nmol/mLvs (11 84± 2 95 )nmol/mL〕 ,随后下降。结论　参麦和丹参注射液合用具有减轻氧自由基 (OFR)对心肌的损伤作用 ,对缺血心肌和缺血 /再灌注心肌具有一定的保护作用。     

急性CO中毒患者血清SOD、GSH-Px活性及MDA水平的变化及其意义

目的：探讨急性一氧化碳中毒（ACOP）患者血清丙二醛（MDA）水平、谷胱甘肽过氧化物酶（GSH－Px）及超氧化物歧化酶（SOD）活性的变化，了解ACOP时自由基氧化损伤在其病理机制中的作用。方法：选择不同中毒程度的ACOP患者70例，分别于入院即刻、12、24、48、72h抽血测定血清中MDA水平及SOD、GSH－Px的活性。结果：ACOP时，中度CO中毒组与轻度中毒组比较，血清MDA水平升高，但不具有显著性意义（P＞0．05）；重度中毒组与中度中毒组比较，MDA水平显著性升高（P＜0．05），且24,48h仍维持在较高水平。中度中毒组与轻度中毒组比较，血清SOD及GSH－Px在性水平降低，但不具有显著性意义（P＞0．05）；重度中毒组与中度中毒组比较，SOD及GSH－Px活性水平显著降低（P＜0．05）。结论：ACOP时血清MDA水平升高，SOD及GSH－Px活性降低，提示ACOP时存在着严重自由基氧化损伤的病理过程，为ACOP治疗过程中抗氧化治疗提供了依据，SOD及GSH－Px活性降低，提示ACOP时存在着严重自由基氧化损伤的病理过程，为ACOP治疗过程中抗氧化治疗提供了依据。同时，血清MDA水平和SOD及GSH－Px活性也可作为中毒损伤程度评估，预后判定的指标之一。     

老年肺心病患者活性氧代谢与红细胞免疫变化关系的研究

目的探讨老年肺心病急性加重期患者活性氧代谢紊乱与红细胞免疫黏附功能变化的关系。方法对 36例老年肺心病急性加重期患者 ,进行了红细胞C3b受体花环率 (RBCC3bRR)、红细胞免疫复合物花环率 (RBCICR)与血清超氧化物歧化酶 (SOD)、谷胱甘肽过氧化物酶 (GSH Px)、丙二醛 (MDA)的同步检测 ,并设 2 0例健康对照组 ,分析指标之间的线性相关关系。结果老年肺心病急性加重期RBCC3bRR、SOD和GSH Px均下降 ,RBCICR、MDA升高 ,与健康对照组相比具有显著性差异 ;直线相关分析显示 :SOD、GSH Px分别与RBCC3bRR呈正相关 ,MDA与RBCC3bRR呈负相关。结论老年肺心病急性加重期活性氧的增加是导致红细胞免疫功能下降的原因之一     

内科危重病患者抗氧化维生素表达及相关因素分析

目的探讨内科危重病患者抗氧化维生素表达及其影响因素。方法采用高效液相色谱仪测定危重病患者维生素A、维生素E、β胡萝卜素血清值,同时检测相关营养评价指标。结果SIRS组血清维生素A〔(0·6±0·2)μmol/L〕、维生素E〔(14·8±6·6)μmol/L〕、β胡萝卜素〔(1·1±0·6)μmol/L〕水平明显降低,较对照组差异有统计学意义(P<0·01),维生素A、维生素E的对数值与APACHEⅡ评分存在负相关性(P<0·01)。结论内科SIRS患者较非SIRS患者承受更重的氧化应激压力,易造成抗氧化维生素的缺乏,其缺乏程度与病情严重程度有相关性。     

慢性肾功能不全患者血清超氧化物歧化酶与谷胱甘肽过氧化物酶变化的意义

本文旨在通过直接测定肾功能不全各阶段SOD及GSH-Px的含量来探讨其变化与临床的关系。 1 材料与方法 1.1 临床资料 正常对照组为某单位体检后的健康人员32例,年龄23～65岁;慢性肾功能不全53例,为我院住院患者。根据肾功能不全分类方法,将其分为4组,其中肾贮备能力丧失期组14例〔血清BUN(7.34±3.86)mmol/L,Cr(126.63±31.42)μmol/L〕;氮质血症期组10例〔血清BUN(11.76±4.23)mmol/L,Cr(188.62±36.33)μmol/L〕;肾功能衰竭期组14例〔血清BUN(25.23±10.44)mmol/L,Cr(562.40±220.11)μmol/L〕;尿毒症期组15例〔血清BUN(31.46±10.28)mmol/L,Cr(1022.36±320.43)μmol/L〕。     

天麻钩藤饮对肝阳上亢型高血压病患者血浆SOD、MDA的影响

目的：探讨天麻钩藤饮对高血压病(肝阳上亢型)患者疗效和血清超氧化物岐化酶(SOD)活性和丙二醛(MDA)的影响，为临床高血压病患者的治疗提供理论依据。方法：在门诊或住院病例中选择符合诊断条件的112例患者，随机分为天麻钩藤饮组(60例)和对照组(52例)，两组治疗4周后，观察治疗前后血压的改变及血清SOD、MDA的变化。结果：两组患者治疗后血压均明显降低，两组比较差异无显著性(P>0．05)。天麻钩藤饮组和对照组的SOD活性在治疗前分别为(85．6±11．2)U／mL和(86．3±12.5)U／mL，在治疗后为(98．1±12．8)U／mL和(95．1±13．2)U／mL，两组治疗后比较差异有显著性(P<0．01)；MDA在治疗前为(6．28±1．65)nmol／L和(6．23±1．58)nmol／L，在治疗后为(4．08±1．30)nmol／L和(5．11±1．39)nmol／L，两组治疗后比较差异有显著性(P<0．01)。结论：天麻钩藤饮能降低高血压患者血压，并能通过提高SOD活性和降低MDA含量而保护机体，提高机体的抗氧化能力。     

白血病细胞内SOD及GSH-Px活性研究

观察了29例白血病患者白血病细胞内超氧化物歧化酶(SOD),谷胱甘肽过氧化酶(GSH—Px)活性及血清脂质过氧化物(LPO)水平。研究结果表明:①白血病细胞内SOD活性明显升高,GSH—Px活性显著降低,血清LPO水平增高;②白血病细胞内SOD及GSH—Px活性分别与外周血白血病细胞百分数呈正负相关;③与单核细胞白血病(M_4,M_5)及淋巴细胞白血病相比,粒细胞白血病(M_1,M_2,M_3)细胞内SOD活性相对较高,GSH—Px活性相对较低;④白血病细胞内SOD活性在白血病缓解与复发过程中无显著性差异,而GSH—Px活性则在缓解后回升,复发时又重新降低。上述结果提示,白血病细胞自身存在有明显的过氧化物损伤,给予白血病患者抗氧化治疗是必要的,白血病细胞GSH—Px活性可作为白血病活动的观察指标。     

通脉酯注射剂治疗急性脑梗死临床研究

目的 :研究通脉酯注射剂 (赤芍 80 1)治疗急性脑梗死的疗效。方法 :随机选择急性脑梗死患者 6 0例(治疗组 ,静滴通脉酯注射剂 180 mg)和对照组 6 0例 (静滴复方丹参注射液 2 0 ml) ,两种药物均加入质量分数为 5 %的葡萄糖或 0 .9%氯化钠溶液 5 0 0 ml中 ,每日 1次 ,连用 14日。治疗组患者治疗前后做血液流变学、血糖、血脂、肝功能、肾功能、心电图检查。结果 :治疗组总有效率 (95 .0 % )明显优于对照组 (75 .0 % ) ,2组比较差异有显著性 (P<0 .0 1) ;通脉酯注射剂治疗前后神经功能缺损程度评分〔(19.2 3± 8.34)分 ,(5 .16± 6 .0 7)分〕及生活能力状态评分〔(4.2 6± 1.35 )分 ,(1.86± 1.77)分〕比较有显著性差异 (P均 <0 .0 1) ,与对照组〔治疗后分别为 (9.2 0± 7.19)分和 (2 .82± 1.83)分〕比较差异亦均有显著性 (P均 <0 .0 1) ;全血黏度、血浆黏度及血小板聚集率均较治疗前下降 ,差异均有显著性 (P均 <0 .0 1) ;而纤维蛋白原较治疗前略有下降 ,但差异无显著性(P>0 .0 5 ) ;未发现有明显不良反应。结论 :通脉酯注射剂 (赤芍 80 1)是治疗急性脑梗死安全有效的药物。     

急性脑梗死患者白细胞介素-6、肿瘤坏死因子及细胞粘附分子的动态研究

目的通过观察急性脑梗死患者血清白细胞介素-6(IL-6)、肿瘤坏死因子(TNF-α)、可溶性细胞粘附分子-1(sICAM-1)、sE-选择素水平的动态变化,探讨其在急性脑梗死发病机制研究中的价值及临床意义。方法应用双抗体夹心酶联免疫吸附法检测39例急性脑梗死患者发病第1、4、7、14天的血清IL-6、TNF-αs、ICAM-1和sE-选择素水平,并与30例正常对照组比较。结果急性脑梗死患者发病第1天血清IL-6水平即升高〔(14.77±7.86)μg/L,P<0.01〕,第4天达峰值〔(19.53±5.25)μg/L〕再逐渐下降,第14天时IL-6水平仍未降到正常〔(9.70±4.61)μg/L,P<0.05〕。血清TNF-α水平在第1天即升高达峰值〔(59.38±14.37)μg/L,P<0.01〕。血清slCAM-1、sE-选择素水平在各时点均高于正常对照组,但各时点间无显著性差异。发病后第1天及第4天血清IL-6、TNF-α水平均与梗死体积呈正相关(r=0.373,P<0.050;r=0.541,P<0.01;r=0.646,P<0.010;r=0.305,P<0.05)。发病第1、4和7天血清TNF-α浓度与slCAM-1、sE-选择素浓度均呈正相关(1d、4d,P<0.01;7dP<0 05)。结论IL-6和TNF-α的检测可能有助于急性脑梗死的临床诊断和脑损害程度的评估,而slCAM-1、sE-选择素则可能与急性脑梗死的炎症发生相关,但与脑损害的程度无关。     

中药离子导入对颈性眩晕患者血浆降钙素基因相关肽的影响

目的 :观察颈性眩晕患者血浆降钙素基因相关肽 ( CGRP)的水平及单向中频电中药导入治疗后患者血浆 CGRP的改变。方法 :对 34例颈性眩晕患者采用单向中频电中药导入治疗 (导入组 ) ;另 34例口服复方丹参片和眩晕停药物治疗作为对照。治疗前后测定血浆 CGRP。结果 :治疗前 6 8例眩晕患者血浆 CGRP〔导入组( 36 .2 3± 2 2 .78) ng/L,服药组 ( 36 .72± 2 2 .85 ) ng/L〕均低于健康人组〔( 5 2 .2 6± 18.5 3) ng/L,P均 <0 .0 1〕,经单向中频电中药导入治疗后患者血浆 CGRP较治疗前明显升高〔导入组 ( 5 0 .12± 2 0 .6 2 ) ng/L,P<0 .0 5 ;服药组 ( 44 .5 2± 2 3.36 ) ng/L ,P>0 .0 5〕。结论 :CGRP参与了颈性眩晕的病理生理过程。     

慢性肾功能衰竭时瘦素与肿瘤坏死因子及内皮素的关系

目的 观察慢性肾功能衰竭患者血清瘦素(Leptin)水平及其与肿瘤坏死因子(TNF)及内皮素(ET)的关系。方法 应用放射免疫方法检测40例慢性肾功能衰竭患者及20例健康志愿者血清Leptin、TNF及ET水平,并对血清Leptin水平与TNF及ET之间的关系进行相关性分析。结果 慢性肾功能衰竭患者血清Leptin水平显著高于正常对照组[(19.25±4.89)μg／L比(5.57±1.69)μg／L,P<0.01],并与TNF及ET水平呈显著正相关(rTNF=0.829,rET=0.605;P均<0.01);而肾功能和血中总蛋白的含量与Leptin之间无相关性(P均>0.05)。结论 慢性肾功能衰竭患者血清TNF及ET水平异常升高和高瘦素血症明显相关。     

血清铁蛋白与2型糖尿病的关系探讨

目的探讨血清铁蛋白(SF)与2型糖尿病患者糖脂代谢、氧化应激和胰岛素抵抗的关系。方法选取研究对象90例,其中2型糖尿病组32例、糖耐量减低(IGT)30例和健康对照组28例。收集和记录患者的一般资料,采用放免法测定SF和空腹胰岛素(FIns),全自动生化仪测定空腹血糖(FPG)、总胆固醇(TC)、三酰甘油(TG)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)和血肌酐(SCr)等生化指标,高压液相法测定糖化血红蛋白(Hb A1c),比色法测定超氧化物歧化酶(SOD)活性及丙二醛(MDA)、谷胱甘肽过氧化物酶(GSH-Px)含量。结果 2型糖尿病组SF水平[(184.2±3.12)μg/L]高于IGT组[(171.5±2.61)μg/L],而IGT组高于健康对照组[(104.1±1.87)μg/L],差异有统计学意义(P0.05)。SF与FIns、MDA、胰岛素抵抗指数、TG、TC和糖化血红蛋呈正相关(r=0.7145,P0.05;r=0.5637,P0.05;r=0.6358,P0.05;r=0.8320,P0.05;r=0.5283,P0.01;r=0.6243,P0.01)。与SOD活性、GSH-Px含量呈负相关(r=0.3413,P0.05;r=0.3153,P0.05)。结论 2型糖尿病患者体内铁贮备增多;铁超负荷促使氧化应激发生进而导致胰岛素抵抗。     

Red blood cell susceptibility to lipid peroxidation, membrane lipid composition, and antioxidant enzymes in continuous ambulatory peritoneal dialysis patients.

OBJECTIVE: To investigate the overall susceptibility of red blood cells (RBC) to lipid peroxidation from patients on continuous ambulatory peritoneal dialysis (CAPD). METHODS: The following parameters were measured: RBC malondialdehyde (MDA) production after oxidative stress with H2O2, RBC antioxidant enzymes glutathione peroxidase (GSH-Px) and superoxide dismutase (SOD), and RBC membrane lipid composition. The levels of plasma vitamin E and serum selenium were also assayed. PATIENTS: Eleven patients on continuous ambulatory peritoneal dialysis. Twenty-one healthy blood donors of similar age were used as normal controls. RESULTS: The MDA formation after H2O2 stimulation was normal in CAPD patients (0.79 +/- 0.1 mumol/gHb versus 0.78 +/- 0.1 in the control group). RBC from CAPD patients also showed a normal SOD activity, a more than adequate vitamin E status, and a peculiar pattern of membrane lipids, with reduced polyunsaturated fatty acids (p less than 0.001) and increased monounsaturated fatty acids (p less than 0.001). Both RBC GSH-Px activity, a selenium-dependent enzyme, and serum selenium levels were significantly lower in CAPD patients, and a significant positive correlation (r = 0.68; p less than 0.02) between the two parameters was found. CONCLUSIONS: This study found a normal sensitivity to oxidant stress in RBC from a group of CAPD patients, despite an impaired GSH-Px activity. The peculiar lipid pattern of RBC membrane, characterized by reduced PUFA and increased MUFA content, may contribute, in addition to adequate SOD activity and vitamin E status, to normal RBC lipid peroxidation.     

Glutathione peroxidase, glutathione reductase, Cu-Zn superoxide dismutase activities, glutathione, nitric oxide, and malondialdehyde concentrations in serum of patients with chronic lymphocytic leukemia

BACKGROUND: Chronic lymphocytic leukemia (CLL) is a rare neoplasm that comprises a substantial proportion of all leukemias in middle-aged persons and is the most common type among elderly persons. The major causes are not known nor is there a detailed understanding about how the elusive origin(s) may relate to clinical expression, basic biological mechanisms, or pathogenesis. METHODS: Glutathione peroxidase (GSH-Px), glutathione reductase (GRD), Cu-Zn superoxide dismutase (Cu-Zn SOD) activities, glutathione (GSH), nitric oxide (NO(*), and malondialdehyde (MDA) concentrations were measured in serum of patients with CLL and a healthy control group. RESULTS: Serum GSH-Px, Cu-Zn SOD activities, GSH concentration were lower in patients with CLL while serum NO(*) and MDA concentrations were higher in these patients compared with the control group. Serum GRD activity was not statistically significant in patients with CLL compared with the control. However, there was no statistically significant difference in the parameters on the basis of stages in these patients. Serum GSH concentration negatively correlated with serum MDA (r=30.63, p<0.05) and NO(*) concentrations (r=0.72, p<0.05) in patients with advanced stage (III+IV). However, no other correlation could be found among the parameters in healthy controls and patients with CLL CONCLUSIONS: There is significant changes in antioxidant defense system in CLL cases, which may lead to enhanced action of oxygen radical, resulting in lipid peroxidation.     

高原地区慢性肺心病患者血浆肾上腺髓质素和脑钠素变化的研究

目的探讨高原地区慢性肺心病患者血浆肾上腺髓质素(ADM)和脑钠素(BNP)的变化及其临床意义。方法用放射免疫分析法测定44例高原肺心病患者急性发作期和缓解期血浆ADM和BNP水平,与内皮素1(ET1)、动脉血氧分压(PaO2)、右室射血前期时间与肺动脉血流加速时间比值(RVPEP/AT)进行相关分析,并与20例当地健康人作对照。结果肺心病组急性发作期和缓解期血浆ADM〔分别为(38.8±7.2)ng/L、(26.2±5.3)ng/L〕和BNP水平〔(81.4±13.8)ng/L、(58.9±9.3)ng/L〕均显著高于健康对照组〔分别为(15.0±3.2)ng/L、(38.6±3.4)ng/L,P均<0.01〕,急性发作期均高于缓解期(P均<0.01)。肺心病组急性发作期和缓解期血浆ADM与PaO2呈显著负相关(r急=0.826,P<0.01;r缓=0.783,P<0.01),与ET1(r急=0.755,P<0.01;r缓=0.668,P<0.01)及RVPEP/AT(r急=0.788,P<0.01;r缓=0.734,P<0.01)呈显著正相关;血浆BNP也与PaO2呈显著负相关(r急=0.787,P<0.01;r缓=0.554,P<0.01),与ET1(r急=0.725,P<0.01;r缓=0.679,P<0.01)及RVPEP/AT(r急=0.771,P<0.01;r缓=0.722,P<0.01)呈显著正相关。结论ADM和BNP可能参与了高原肺心病的病理生理过程,并在其中具有代偿作用。     

瘦素保护脓毒症后肾功能及其机制的研究

目的观察脓毒症对肾功能及相关酶活性的影响,探讨瘦素(Leptin)在急性炎症反应中的作用。方法采用盲肠结扎穿孔术制备小鼠脓毒症模型,用分光光度法检测血尿酸(UA)以及肾组织匀浆液中髓过氧化物酶(MPO)、谷胱甘肽S转移酶(GST)、黄嘌呤氧化酶(XOD)、超氧化物歧化酶(SOD)等4种与自由基合成、解毒和嘌呤生成代谢相关的酶活性;采用放射免疫分析法测定肾组织匀浆液中Leptin水平,同时观察肾组织病理学改变。结果腹腔内注射Leptin(0.08mg/kg)和消炎痛(8mg/kg)可分别降低脓毒症后12h时血清UA水平〔分别为(295.79±80.86)μmol/L和(281.78±46.35)μmol/L,脓毒症组为(474.03±75.22)μmol/L〕;Leptin保护组脓毒症后12h和消炎痛保护组脓毒症后6h肾组织Leptin水平〔分别为(196.00±134.30)μg/g和(169.30±132.00)μg/g〕亦显著高于脓毒症组〔(61.65±27.29)μg/g〕。而Leptin和消炎痛保护后6h和12h对肾组织MPO、GST、XOD和SOD等酶活性有不同程度的影响,但结果并非完全抑制或促进。从总体上分析,Leptin和消炎痛有促进氧自由基清除和灭活的功能。结论低剂量Leptin可能对脓毒症后肾功能有一定的改善作用,其机制可能同消炎痛相似,与清除和灭活肾组织中氧自由基有关。     

血清白细胞介素-18在慢性肾功能衰竭患者中的表达及其意义

目的 观察慢性肾功能衰竭(CRF)患者血清白细胞介素(IL)-18水平的变化及与相关指标的关系,探讨其临床意义.方法 入选的CRF患者60例,分为肾功能衰竭非透析组(肾衰组)18例、血透组22例、腹透组20例.另设正常对照组20例.用EusA方法 检测血清IL-18、肿瘤坏死因子(TNF)-α和超敏C-反应蛋白(hs-CRP)水平,常规实验室方法 检测血清白蛋白(ALB)、TC、TG和血肌酐(SCr),根据简化的肾病饮食改良(MDRD)公式计算肾小球滤过率(GFR).比较各组间的差别.结果 CRF患者的血清IL-18水平在肾衰组[(497.7±120.7)ns/L]、血透组[(538,1 ±113.2)ns/L]、腹透组[(565.7±122.1)ng/L]均较正常对照组[(163.9±42.2)ng/L]显著升高(均P<0.01),而腹透组明显高于肾衰组(P<0.05),血透组和肾衰组之间的差异无统计学意义(P>0.05).患者的血清IL-18水平与TNF-α、hs.CRP、SCr呈显著正相关(r值分别为0.636、0.436、0.367,均P<0.01),与GFR呈显著负相关(r=-0.515,P<0.05).结论 CRF患者无论透析还是非透析,其血清IL-18水平均显著升高,并与TNF-α、CRP、GFR等因素有关.因此IL-18可能是CRF患者亚临床炎症的一种标志物.     

慢性乙型肝炎患者中性粒细胞功能与脂质过氧化损伤的关系

目的探讨慢性乙型肝炎患者中性粒细胞趋化功能与脂质过氧化的关系。方法应用琼脂糖淀胶玻片法和化学比色法对102例慢性乙型肝炎患者进行中性粒细胞趋化功能测定和超氧化物歧化酶（SOD）、丙二醛（MDA）水平检测,并与35例健康人作比较。结果各型慢性乙型肝炎患者趋化指数和SOD水平均低于健康对照组（P〈0.01）,而MDA水平高于健康对照组（P〈0.01）,血清SOD水平与MDA水平呈显著负相关（r=-0.468 4,P〈0.01）,结论慢性乙型肝炎患者中性粒细胞趋化功能的降低与脂质过氧化有一定的相关性。     

A novel stop codon mutation (X465Y) in the argininosuccinate lyase gene in a patient with argininosuccinic aciduria

The purpose of this study was to examine the change in lipid peroxidation and antioxidant enzyme activities in healthy subjects and to evaluate the concentrations of superoxide dismutase, glutathione peroxidase and malondialdehyde, an end product of lipid peroxidation in exercise and smoking. Study included 257 appearently healthy individuals, 133 males and 124 females. In all subjects, malondialdehyde (MDA) levels were analyzed as an indicator of the lipid peroxidation activities. Superoxide dismutase, glutathione peroxidase activities were measured as an indicator of antioxidant activities. Oxidative stress was estimated by the method based on thiobarbituric acid reactivity. Erythrocyte superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activities were estimated on hemolysates by use of commercial available kits (Randox lab., Dublin, Ireland). For all groups serum lipid peroxidation and erythrocyte SOD and GSH-Px were obtained at the initial and the following periods. Serum MDA level was higher in the elderly than in the children and in the adults. MDA levels were higher in the smoking, acute exercise than their counterparts in the control groups. GSH-Px activity was significantly lower in the acute exercise group, and higher in the trained group than those as controls. SOD decreased in the elderly, smoking and acute exercise groups and increased in trained individuals. There was a significant increase in lipid peroxidation activity and a significant decrease in antioxidant enzyme activity in cases of acute exercise and smoking as well as the elderly.     

The effect of dietary treatment on erythrocyte lipid peroxidation, superoxide dismutase, glutathione peroxidase, and serum lipid peroxidation in patients with type 2 diabetes mellitus

Objectives: The aim of the present study was to investigate the effect of dietary treatment on serum and erythrocyte lipid peroxidation and erythrocyte antioxidative enzyme activity of patients with Type 2 diabetes.

Design and methods: A total of 30 patients with newly diagnosed as Type 2 diabetes were enrolled to the study. A total of 30 healthy subjects served as controls. Diabetic patients were given standard dietary treatment that was composed of 50% to 55% carbohydrate and 30% fat for 2 months. No diet was applied for controls. For both groups serum and erythrocyte lipid peroxidation and erythrocyte superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) were obtained at first and at the end of 2 months.

Results: Diabetic patients had higher serum and erythrocyte lipid peroxidation than those of controls before dietary treatment(p < 0.05). However, there was no absolute differences in erythrocyte SOD and GSH-Px (p > 0.05). At the end of 2 months of dietary treatment, while diabetics had still higher glucose and erythrocyte lipid peroxidation than controls (p < 0.05), serum lipid peroxidation, erythrocyte SOD, and GSH-Px levels did not differ significantly from those of controls (p > 0.05). In diabetic patients, after 2 months of dietary treatment, whereas serum and erythrocyte lipid peroxidation decreased, erythrocyte SOD and GSH-Px activities showed significant increase (p < 0.05).

Conclusions: Our results showed significant alteration in serum and erythrocyte lipid peroxidation and erythrocyte antioxidant enzyme status of patients with Type 2 diabetes by dietary treatment. However, whether such alterations have clinical importance for diabetic patients needs further investigation.